Toolbar used in android Fragment

setSupportActionBar(toolbar);

You can override the onCreateOptionsMenu and onoptionsiteselected methods;

But in Fragment, you need to

((AppCompatActivity)getActivity()).setSupportActionBar(mToolbar);

In Fragment, you need to change getActivity() to AppCompatActivity to get setSupportActionBar method;

There is also a row to be added in the Fragment

setHasOptionsMenu(true);

To call the onCreateOptionsMenu and onoptionsiteselected methods;

If there is a judgment in the onCreateOptionsMenu method, for example, when changing a state, some menu item s will not be displayed, you can use the following to call the onCreateOptionsMenu method again

getActivity().invalidateOptionsMenu();

Example:

@Override protected void initListener() { ((AppCompatActivity)getActivity()).setSupportActionBar(mToolbar); setHasOptionsMenu(true); ｝ @Override public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) { inflater.inflate(R.menu.menu_edit_select,menu); if(showEditSelect){ menu.findItem(R.id.menu_edit).setVisible(true); menu.findItem(R.id.menu_cancel).setVisible(false); }else{ menu.findItem(R.id.menu_edit).setVisible(false); menu.findItem(R.id.menu_cancel).setVisible(true); } } @Override public boolean onOptionsItemSelected(MenuItem item) { switch (item.getItemId()){ //When you click on an entry, the other one is not displayed case R.id.menu_edit: showEditSelect = false; getActivity().invalidateOptionsMenu(); break; case R.id.menu_cancel: showEditSelect = true; getActivity().invalidateOptionsMenu(); break; } return true; }

menu_edit_select.xml

<?xml version="1.0" encoding="utf-8"?> <menu xmlns:android="http://schemas.android.com/apk/res/android" xmlns:app="http://schemas.android.com/apk/res-auto"> <item android:id="@+id/menu_edit" android:title="edit" android:orderInCategory="100" app:showAsAction="ifRoom|withText"/> <item android:id="@+id/menu_cancel" android:title="cancel" android:orderInCategory="101" android:visible="false" app:showAsAction="ifRoom|withText"/> </menu>

Click "Edit" in the title bar menu to display "Cancel" in the original position, and click "Cancel" to display "Edit".

2 December 2019, 07:12 | Views: 6020